Improve self host support (#28)

* Add docker setup for self hosting

* Add ses settings tables

apps/web/src/server/service/ses-settings-service.ts

@@ -0,0 +1,195 @@
+import { SesSetting } from "@prisma/client";
+import { db } from "../db";
+import { env } from "~/env";
+import { customAlphabet } from "nanoid";
+import * as sns from "~/server/aws/sns";
+import * as ses from "~/server/aws/ses";
+import { EventType } from "@aws-sdk/client-sesv2";
+
+const nanoid = customAlphabet("1234567890abcdef", 10);
+
+const GENERAL_EVENTS: EventType[] = [
+  "BOUNCE",
+  "COMPLAINT",
+  "DELIVERY",
+  "DELIVERY_DELAY",
+  "REJECT",
+  "RENDERING_FAILURE",
+  "SEND",
+  "SUBSCRIPTION",
+];
+
+export class SesSettingsService {
+  private static cache: Record<string, SesSetting> = {};
+
+  public static getSetting(region = env.AWS_DEFAULT_REGION): SesSetting | null {
+    if (this.cache[region]) {
+      return this.cache[region] as SesSetting;
+    }
+    return null;
+  }
+
+  public static getAllSettings() {
+    return Object.values(this.cache);
+  }
+
+  /**
+   * Creates a new setting in AWS for the given region and unsendUrl
+   *
+   * @param region
+   * @param unsendUrl
+   */
+  public static async createSesSetting({
+    region,
+    unsendUrl,
+  }: {
+    region: string;
+    unsendUrl: string;
+  }) {
+    if (this.cache[region]) {
+      throw new Error(`SesSetting for region ${region} already exists`);
+    }
+
+    const unsendUrlValidation = await isValidUnsendUrl(unsendUrl);
+
+    if (!unsendUrlValidation.isValid) {
+      throw new Error(
+        `Unsend URL ${unsendUrl} is not valid, status: ${unsendUrlValidation.code} ${unsendUrlValidation.error}`
+      );
+    }
+
+    const idPrefix = nanoid(10);
+
+    const setting = await db.sesSetting.create({
+      data: {
+        region,
+        callbackUrl: `${unsendUrl}/api/ses_callback`,
+        topic: `${idPrefix}-${region}-unsend`,
+        idPrefix,
+      },
+    });
+
+    await createSettingInAws(setting);
+
+    this.invalidateCache();
+  }
+
+  public static async init() {
+    const settings = await db.sesSetting.findMany();
+    settings.forEach((setting) => {
+      this.cache[setting.region] = setting;
+    });
+  }
+
+  static invalidateCache() {
+    this.cache = {};
+    this.init();
+  }
+}
+
+async function createSettingInAws(setting: SesSetting) {
+  await registerTopicInAws(setting).then(registerConfigurationSet);
+}
+
+/**
+ * Creates a new topic in AWS and subscribes the callback URL to it
+ */
+async function registerTopicInAws(setting: SesSetting) {
+  const topicArn = await sns.createTopic(setting.topic);
+
+  if (!topicArn) {
+    throw new Error("Failed to create SNS topic");
+  }
+
+  await sns.subscribeEndpoint(
+    topicArn,
+    `${setting.callbackUrl}/api/ses_callback`
+  );
+
+  return await db.sesSetting.update({
+    where: {
+      id: setting.id,
+    },
+    data: {
+      topicArn,
+    },
+  });
+}
+
+/**
+ * Creates a new configuration set in AWS for given region
+ * Totally consist of 4 configs.
+ * 1. General - for general events
+ * 2. Click - for click tracking
+ * 3. Open - for open tracking
+ * 4. Full - for click and open tracking
+ */
+async function registerConfigurationSet(setting: SesSetting) {
+  if (!setting.topicArn) {
+    throw new Error("Setting does not have a topic ARN");
+  }
+
+  const configGeneral = `${setting.idPrefix}-${setting.region}-unsend-general`;
+  const generalStatus = await ses.addWebhookConfiguration(
+    configGeneral,
+    setting.topicArn,
+    GENERAL_EVENTS
+  );
+
+  const configClick = `${setting.idPrefix}-${setting.region}-unsend-click`;
+  const clickStatus = await ses.addWebhookConfiguration(
+    configClick,
+    setting.topicArn,
+    [...GENERAL_EVENTS, "CLICK"]
+  );
+
+  const configOpen = `${setting.idPrefix}-${setting.region}-unsend-open`;
+  const openStatus = await ses.addWebhookConfiguration(
+    configOpen,
+    setting.topicArn,
+    [...GENERAL_EVENTS, "OPEN"]
+  );
+
+  const configFull = `${setting.idPrefix}-${setting.region}-unsend-full`;
+  const fullStatus = await ses.addWebhookConfiguration(
+    configFull,
+    setting.topicArn,
+    [...GENERAL_EVENTS, "CLICK", "OPEN"]
+  );
+
+  return await db.sesSetting.update({
+    where: {
+      id: setting.id,
+    },
+    data: {
+      configGeneral,
+      configGeneralSuccess: generalStatus,
+      configClick,
+      configClickSuccess: clickStatus,
+      configOpen,
+      configOpenSuccess: openStatus,
+      configFull,
+      configFullSuccess: fullStatus,
+    },
+  });
+}
+
+async function isValidUnsendUrl(url: string) {
+  try {
+    const response = await fetch(`${url}/api/ses_callback`, {
+      method: "POST",
+      body: JSON.stringify({ fromUnsend: true }),
+    });
+    return {
+      isValid: response.status === 200,
+      code: response.status,
+      error: response.statusText,
+    };
+  } catch (e) {
+    return {
+      isValid: false,
+      code: 500,
+      error: e,
+    };
+  }
+}